iio: ti-ads124s08: Add DT binding documentation

Adding binding documentation for Texas Instruments ADS124S08
and ADS124S06 ADC.

S08 is a 12 channel ADC
S06 is a 6 channel ADC

Datesheet can be found here:
http://www.ti.com/lit/gpn/ads124s08

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/Documentation/devicetree/bindings/iio/adc/ti-ads124s08.txt b/Documentation/devicetree/bindings/iio/adc/ti-ads124s08.txt
new file mode 100644 (file)
index 0000000..ecf807b
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ti-ads124s08.txt
@@ -0,0 +1,25 @@
+* Texas Instruments' ads124s08 and ads124s06 ADC chip
+
+Required properties:
+ - compatible :
+       "ti,ads124s08"
+       "ti,ads124s06"
+ - reg : spi chip select number for the device
+
+Recommended properties:
+ - spi-max-frequency : Definition as per
+               Documentation/devicetree/bindings/spi/spi-bus.txt
+ - spi-cpha : Definition as per
+               Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Optional properties:
+ - reset-gpios : GPIO pin used to reset the device.
+
+Example:
+adc@0 {
+       compatible = "ti,ads124s08";
+       reg = <0>;
+       spi-max-frequency = <1000000>;
+       spi-cpha;
+       reset-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
+};